/*
 * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package org.graalvm.compiler.hotspot;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

import org.graalvm.compiler.api.replacements.Fold;
import org.graalvm.compiler.api.replacements.Fold.InjectedParameter;
import org.graalvm.compiler.core.common.CompressEncoding;
import org.graalvm.compiler.hotspot.nodes.GraalHotSpotVMConfigNode;

import jdk.vm.ci.common.JVMCIError;
import jdk.vm.ci.hotspot.HotSpotVMConfigAccess;
import jdk.vm.ci.hotspot.HotSpotVMConfigStore;

/**
 * Used to access native configuration details.
 */
public class GraalHotSpotVMConfig extends HotSpotVMConfigAccess {

    /**
     * Sentinel value to use for an {@linkplain InjectedParameter injected}
     * {@link GraalHotSpotVMConfig} parameter to a {@linkplain Fold foldable} method.
     */
    public static final GraalHotSpotVMConfig INJECTED_VMCONFIG = null;

    private final boolean isJDK8 = System.getProperty("java.specification.version").compareTo("1.9") < 0;
    public final String osName = getHostOSName();
    public final String osArch = getHostArchitectureName();
    public final boolean windowsOs = System.getProperty("os.name", "").startsWith("Windows");
    public final boolean linuxOs = System.getProperty("os.name", "").startsWith("Linux");

    GraalHotSpotVMConfig(HotSpotVMConfigStore store) {
        super(store);

        assert narrowKlassShift <= logKlassAlignment;
        assert narrowOopShift <= logMinObjAlignment();
        oopEncoding = new CompressEncoding(narrowOopBase, narrowOopShift);
        klassEncoding = new CompressEncoding(narrowKlassBase, narrowKlassShift);

        assert check();
    }

    /**
     * Gets the value of a static C++ field under two possible names. {@code name} is the preferred
     * name and will be checked first.
     *
     * @param name fully qualified name of the field
     * @param alternateName fully qualified alternate name of the field
     * @param type the boxed type to which the constant value will be converted
     * @param cppType if non-null, the expected C++ type of the field (e.g., {@code "HeapWord*"})
     * @return the value of the requested field
     * @throws JVMCIError if the field is not static or not present
     */
    public <T> T getFieldValueWithAlternate(String name, String alternateName, Class<T> type, String cppType) {
        try {
            return getFieldValue(name, type, cppType);
        } catch (JVMCIError e) {
            try {
                return getFieldValue(alternateName, type, cppType);
            } catch (JVMCIError e2) {
                throw new JVMCIError("expected VM field not found: " + name + " or " + alternateName);
            }
        }
    }

    private final CompressEncoding oopEncoding;
    private final CompressEncoding klassEncoding;

    public CompressEncoding getOopEncoding() {
        return oopEncoding;
    }

    public CompressEncoding getKlassEncoding() {
        return klassEncoding;
    }

    /**
     * Gets the host operating system name.
     */
    private static String getHostOSName() {
        String osName = System.getProperty("os.name");
        switch (osName) {
            case "Linux":
                osName = "linux";
                break;
            case "SunOS":
                osName = "solaris";
                break;
            case "Mac OS X":
                osName = "bsd";
                break;
            default:
                // Of course Windows is different...
                if (osName.startsWith("Windows")) {
                    osName = "windows";
                } else {
                    throw new JVMCIError("Unexpected OS name: " + osName);
                }
        }
        return osName;
    }

    private static String getHostArchitectureName() {
        String arch = System.getProperty("os.arch");
        switch (arch) {
            case "x86_64":
                arch = "amd64";
                break;
            case "sparcv9":
                arch = "sparc";
                break;
        }
        return arch;
    }

    private final Integer intRequiredOnAMD64 = osArch.equals("amd64") ? null : 0;
    private final Long longRequiredOnAMD64 = osArch.equals("amd64") ? null : 0L;
    private final Integer intNotPresentInJDK8 = isJDK8 ? 0 : null;
    private final Long longNotPresentInJDK8 = isJDK8 ? 0L : null;

    public final boolean cAssertions = getConstant("ASSERT", Boolean.class);

    public final int codeEntryAlignment = getFlag("CodeEntryAlignment", Integer.class);
    public final boolean enableContended = getFlag("EnableContended", Boolean.class);
    public final boolean restrictContended = getFlag("RestrictContended", Boolean.class);
    public final int contendedPaddingWidth = getFlag("ContendedPaddingWidth", Integer.class);
    public final int fieldsAllocationStyle = getFlag("FieldsAllocationStyle", Integer.class);
    public final boolean compactFields = getFlag("CompactFields", Boolean.class);
    public final boolean verifyOops = getFlag("VerifyOops", Boolean.class);
    public final boolean ciTime = getFlag("CITime", Boolean.class);
    public final boolean ciTimeEach = getFlag("CITimeEach", Boolean.class);
    public final boolean dontCompileHugeMethods = getFlag("DontCompileHugeMethods", Boolean.class);
    public final int hugeMethodLimit = getFlag("HugeMethodLimit", Integer.class);
    public final boolean printInlining = getFlag("PrintInlining", Boolean.class);
    public final boolean inline = getFlag("Inline", Boolean.class);
    public final boolean useFastLocking = getFlag("JVMCIUseFastLocking", Boolean.class);
    public final boolean forceUnreachable = getFlag("ForceUnreachable", Boolean.class);
    public final int codeSegmentSize = getFlag("CodeCacheSegmentSize", Integer.class);
    public final boolean foldStableValues = getFlag("FoldStableValues", Boolean.class);

    public final boolean useTLAB = getFlag("UseTLAB", Boolean.class);
    public final boolean useBiasedLocking = getFlag("UseBiasedLocking", Boolean.class);
    public final boolean usePopCountInstruction = getFlag("UsePopCountInstruction", Boolean.class);
    public final boolean useAESIntrinsics = getFlag("UseAESIntrinsics", Boolean.class);
    public final boolean useCRC32Intrinsics = getFlag("UseCRC32Intrinsics", Boolean.class);

    private final boolean useMultiplyToLenIntrinsic = getFlag("UseMultiplyToLenIntrinsic", Boolean.class);
    private final boolean useSHA1Intrinsics = getFlag("UseSHA1Intrinsics", Boolean.class);
    private final boolean useSHA256Intrinsics = getFlag("UseSHA256Intrinsics", Boolean.class);
    private final boolean useSHA512Intrinsics = getFlag("UseSHA512Intrinsics", Boolean.class);
    private final boolean useMontgomeryMultiplyIntrinsic = getFlag("UseMontgomeryMultiplyIntrinsic", Boolean.class, false);
    private final boolean useMontgomerySquareIntrinsic = getFlag("UseMontgomerySquareIntrinsic", Boolean.class, false);
    private final boolean useMulAddIntrinsic = getFlag("UseMulAddIntrinsic", Boolean.class, false);
    private final boolean useSquareToLenIntrinsic = getFlag("UseSquareToLenIntrinsic", Boolean.class, false);

    /*
     * These are methods because in some JDKs the flags are visible but the stubs themselves haven't
     * been exported so we have to check both if the flag is on and if we have the stub.
     */
    public boolean useMultiplyToLenIntrinsic() {
        return useMultiplyToLenIntrinsic && multiplyToLen != 0;
    }

    public boolean useSHA1Intrinsics() {
        return useSHA1Intrinsics && sha1ImplCompress != 0;
    }

    public boolean useSHA256Intrinsics() {
        return useSHA256Intrinsics && sha256ImplCompress != 0;
    }

    public boolean useSHA512Intrinsics() {
        return useSHA512Intrinsics && sha512ImplCompress != 0;
    }

    public boolean useMontgomeryMultiplyIntrinsic() {
        return useMontgomeryMultiplyIntrinsic && montgomeryMultiply != 0;
    }

    public boolean useMontgomerySquareIntrinsic() {
        return useMontgomerySquareIntrinsic && montgomerySquare != 0;
    }

    public boolean useMulAddIntrinsic() {
        return useMulAddIntrinsic && mulAdd != 0;
    }

    public boolean useSquareToLenIntrinsic() {
        return useSquareToLenIntrinsic && squareToLen != 0;
    }

    public final boolean useG1GC = getFlag("UseG1GC", Boolean.class);
    public final boolean useCMSGC = getFlag("UseConcMarkSweepGC", Boolean.class);

    public final int allocatePrefetchStyle = getFlag("AllocatePrefetchStyle", Integer.class);
    public final int allocatePrefetchInstr = getFlag("AllocatePrefetchInstr", Integer.class);
    public final int allocatePrefetchLines = getFlag("AllocatePrefetchLines", Integer.class);
    public final int allocateInstancePrefetchLines = getFlag("AllocateInstancePrefetchLines", Integer.class);
    public final int allocatePrefetchStepSize = getFlag("AllocatePrefetchStepSize", Integer.class);
    public final int allocatePrefetchDistance = getFlag("AllocatePrefetchDistance", Integer.class);

    private final long universeCollectedHeap = getFieldValue("CompilerToVM::Data::Universe_collectedHeap", Long.class, "CollectedHeap*");
    private final int collectedHeapTotalCollectionsOffset = getFieldOffset("CollectedHeap::_total_collections", Integer.class, "unsigned int");

    public long gcTotalCollectionsAddress() {
        return universeCollectedHeap + collectedHeapTotalCollectionsOffset;
    }

    public final boolean useDeferredInitBarriers = getFlag("ReduceInitialCardMarks", Boolean.class);

    // Compressed Oops related values.
    public final boolean useCompressedOops = getFlag("UseCompressedOops", Boolean.class);
    public final boolean useCompressedClassPointers = getFlag("UseCompressedClassPointers", Boolean.class);

    public final long narrowOopBase = getFieldValue("CompilerToVM::Data::Universe_narrow_oop_base", Long.class, "address");
    public final int narrowOopShift = getFieldValue("CompilerToVM::Data::Universe_narrow_oop_shift", Integer.class, "int");
    public final int objectAlignment = getFlag("ObjectAlignmentInBytes", Integer.class);

    public final int minObjAlignment() {
        return objectAlignment / heapWordSize;
    }

    public final int logMinObjAlignment() {
        return (int) (Math.log(objectAlignment) / Math.log(2));
    }

    public final int narrowKlassSize = getFieldValue("CompilerToVM::Data::sizeof_narrowKlass", Integer.class, "int");
    public final long narrowKlassBase = getFieldValue("CompilerToVM::Data::Universe_narrow_klass_base", Long.class, "address");
    public final int narrowKlassShift = getFieldValue("CompilerToVM::Data::Universe_narrow_klass_shift", Integer.class, "int");
    public final int logKlassAlignment = getConstant("LogKlassAlignmentInBytes", Integer.class);

    public final int stackShadowPages = getFlag("StackShadowPages", Integer.class);
    public final int stackReservedPages = getFlag("StackReservedPages", Integer.class, 0);
    public final boolean useStackBanging = getFlag("UseStackBanging", Boolean.class);
    public final int stackBias = getConstant("STACK_BIAS", Integer.class);
    public final int vmPageSize = getFieldValue("CompilerToVM::Data::vm_page_size", Integer.class, "int");

    public final int markOffset = getFieldOffset("oopDesc::_mark", Integer.class, "markOop");
    public final int hubOffset = getFieldOffset("oopDesc::_metadata._klass", Integer.class, "Klass*");

    public final int prototypeMarkWordOffset = getFieldOffset("Klass::_prototype_header", Integer.class, "markOop");
    public final int subklassOffset = getFieldOffset("Klass::_subklass", Integer.class, "Klass*");
    public final int nextSiblingOffset = getFieldOffset("Klass::_next_sibling", Integer.class, "Klass*");
    public final int superCheckOffsetOffset = getFieldOffset("Klass::_super_check_offset", Integer.class, "juint");
    public final int secondarySuperCacheOffset = getFieldOffset("Klass::_secondary_super_cache", Integer.class, "Klass*");
    public final int secondarySupersOffset = getFieldOffset("Klass::_secondary_supers", Integer.class, "Array<Klass*>*");

    public final boolean classMirrorIsHandle;
    public final int classMirrorOffset;
    {
        String name = "Klass::_java_mirror";
        int offset = -1;
        boolean isHandle = false;
        try {
            offset = getFieldOffset(name, Integer.class, "oop");
        } catch (JVMCIError e) {

        }
        if (offset == -1) {
            try {
                offset = getFieldOffset(name, Integer.class, "jobject");
                isHandle = true;
            } catch (JVMCIError e) {

            }
        }
        if (offset == -1) {
            throw new JVMCIError("cannot get offset of field " + name + " with type oop or jobject");
        }
        classMirrorOffset = offset;
        classMirrorIsHandle = isHandle;
    }

    public final int klassSuperKlassOffset = getFieldOffset("Klass::_super", Integer.class, "Klass*");
    public final int klassModifierFlagsOffset = getFieldOffset("Klass::_modifier_flags", Integer.class, "jint");
    public final int klassAccessFlagsOffset = getFieldOffset("Klass::_access_flags", Integer.class, "AccessFlags");
    public final int klassLayoutHelperOffset = getFieldOffset("Klass::_layout_helper", Integer.class, "jint");

    public final int klassLayoutHelperNeutralValue = getConstant("Klass::_lh_neutral_value", Integer.class);
    public final int layoutHelperLog2ElementSizeShift = getConstant("Klass::_lh_log2_element_size_shift", Integer.class);
    public final int layoutHelperLog2ElementSizeMask = getConstant("Klass::_lh_log2_element_size_mask", Integer.class);
    public final int layoutHelperElementTypeShift = getConstant("Klass::_lh_element_type_shift", Integer.class);
    public final int layoutHelperElementTypeMask = getConstant("Klass::_lh_element_type_mask", Integer.class);
    public final int layoutHelperHeaderSizeShift = getConstant("Klass::_lh_header_size_shift", Integer.class);
    public final int layoutHelperHeaderSizeMask = getConstant("Klass::_lh_header_size_mask", Integer.class);
    public final int layoutHelperArrayTagShift = getConstant("Klass::_lh_array_tag_shift", Integer.class);
    public final int layoutHelperArrayTagTypeValue = getConstant("Klass::_lh_array_tag_type_value", Integer.class);
    public final int layoutHelperArrayTagObjectValue = getConstant("Klass::_lh_array_tag_obj_value", Integer.class);

    /**
     * This filters out the bit that differentiates a type array from an object array.
     */
    public int layoutHelperElementTypePrimitiveInPlace() {
        return (layoutHelperArrayTagTypeValue & ~layoutHelperArrayTagObjectValue) << layoutHelperArrayTagShift;
    }

    public final int vtableEntrySize = getFieldValue("CompilerToVM::Data::sizeof_vtableEntry", Integer.class, "int");
    public final int vtableEntryMethodOffset = getFieldOffset("vtableEntry::_method", Integer.class, "Method*");

    public final int instanceKlassInitStateOffset = getFieldOffset("InstanceKlass::_init_state", Integer.class, "u1");
    public final int instanceKlassConstantsOffset = getFieldOffset("InstanceKlass::_constants", Integer.class, "ConstantPool*");
    public final int instanceKlassFieldsOffset = getFieldOffset("InstanceKlass::_fields", Integer.class, "Array<u2>*");
    public final int klassVtableStartOffset = getFieldValue("CompilerToVM::Data::Klass_vtable_start_offset", Integer.class, "int");
    public final int klassVtableLengthOffset = getFieldValue("CompilerToVM::Data::Klass_vtable_length_offset", Integer.class, "int");

    public final int instanceKlassStateLinked = getConstant("InstanceKlass::linked", Integer.class);
    public final int instanceKlassStateFullyInitialized = getConstant("InstanceKlass::fully_initialized", Integer.class);

    public final int arrayOopDescSize = getFieldValue("CompilerToVM::Data::sizeof_arrayOopDesc", Integer.class, "int");

    /**
     * The offset of the array length word in an array object's header.
     *
     * See {@code arrayOopDesc::length_offset_in_bytes()}.
     */
    public final int arrayOopDescLengthOffset() {
        return useCompressedClassPointers ? hubOffset + narrowKlassSize : arrayOopDescSize;
    }

    public final int arrayU1LengthOffset = getFieldOffset("Array<int>::_length", Integer.class, "int");
    public final int arrayU1DataOffset = getFieldOffset("Array<u1>::_data", Integer.class);
    public final int arrayU2DataOffset = getFieldOffset("Array<u2>::_data", Integer.class);
    public final int metaspaceArrayLengthOffset = getFieldOffset("Array<Klass*>::_length", Integer.class, "int");
    public final int metaspaceArrayBaseOffset = getFieldOffset("Array<Klass*>::_data[0]", Integer.class, "Klass*");

    public final int arrayClassElementOffset = getFieldOffset("ObjArrayKlass::_element_klass", Integer.class, "Klass*");

    public final int fieldInfoAccessFlagsOffset = getConstant("FieldInfo::access_flags_offset", Integer.class);
    public final int fieldInfoNameIndexOffset = getConstant("FieldInfo::name_index_offset", Integer.class);
    public final int fieldInfoSignatureIndexOffset = getConstant("FieldInfo::signature_index_offset", Integer.class);
    public final int fieldInfoInitvalIndexOffset = getConstant("FieldInfo::initval_index_offset", Integer.class);
    public final int fieldInfoLowPackedOffset = getConstant("FieldInfo::low_packed_offset", Integer.class);
    public final int fieldInfoHighPackedOffset = getConstant("FieldInfo::high_packed_offset", Integer.class);
    public final int fieldInfoFieldSlots = getConstant("FieldInfo::field_slots", Integer.class);

    public final int fieldInfoTagSize = getConstant("FIELDINFO_TAG_SIZE", Integer.class);

    public final int jvmAccMonitorMatch = getConstant("JVM_ACC_MONITOR_MATCH", Integer.class);
    public final int jvmAccHasMonitorBytecodes = getConstant("JVM_ACC_HAS_MONITOR_BYTECODES", Integer.class);
    public final int jvmAccHasFinalizer = getConstant("JVM_ACC_HAS_FINALIZER", Integer.class);
    public final int jvmAccFieldInternal = getConstant("JVM_ACC_FIELD_INTERNAL", Integer.class);
    public final int jvmAccFieldStable = getConstant("JVM_ACC_FIELD_STABLE", Integer.class);
    public final int jvmAccFieldHasGenericSignature = getConstant("JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE", Integer.class);
    public final int jvmAccWrittenFlags = getConstant("JVM_ACC_WRITTEN_FLAGS", Integer.class);
    public final int jvmAccSynthetic = getConstant("JVM_ACC_SYNTHETIC", Integer.class);

    public final int threadTlabOffset = getFieldOffset("Thread::_tlab", Integer.class, "ThreadLocalAllocBuffer");
    public final int javaThreadAnchorOffset = getFieldOffset("JavaThread::_anchor", Integer.class, "JavaFrameAnchor");
    public final int threadObjectOffset = getFieldOffset("JavaThread::_threadObj", Integer.class, "oop");
    public final int osThreadOffset = getFieldOffset("JavaThread::_osthread", Integer.class, "OSThread*");
    public final int javaThreadDirtyCardQueueOffset = getFieldOffset("JavaThread::_dirty_card_queue", Integer.class, "DirtyCardQueue");
    public final int threadIsMethodHandleReturnOffset = getFieldOffset("JavaThread::_is_method_handle_return", Integer.class, "int");
    public final int javaThreadSatbMarkQueueOffset = getFieldOffset("JavaThread::_satb_mark_queue", Integer.class);
    public final int threadObjectResultOffset = getFieldOffset("JavaThread::_vm_result", Integer.class, "oop");
    public final int jvmciCountersThreadOffset = getFieldOffset("JavaThread::_jvmci_counters", Integer.class, "jlong*");
    public final int javaThreadReservedStackActivationOffset = getFieldOffset("JavaThread::_reserved_stack_activation", Integer.class, "address", intNotPresentInJDK8);

    /**
     * An invalid value for {@link #rtldDefault}.
     */
    public static final long INVALID_RTLD_DEFAULT_HANDLE = 0xDEADFACE;

    /**
     * Address of the library lookup routine. The C signature of this routine is:
     *
     * <pre>
     *     void* (const char *filename, char *ebuf, int ebuflen)
     * </pre>
     */
    public final long dllLoad = getAddress("os::dll_load");

    /**
     * Address of the library lookup routine. The C signature of this routine is:
     *
     * <pre>
     *     void* (void* handle, const char* name)
     * </pre>
     */
    public final long dllLookup = getAddress("os::dll_lookup");

    /**
     * A pseudo-handle which when used as the first argument to {@link #dllLookup} means lookup will
     * return the first occurrence of the desired symbol using the default library search order. If
     * this field is {@value #INVALID_RTLD_DEFAULT_HANDLE}, then this capability is not supported on
     * the current platform.
     */
    public final long rtldDefault = getAddress("RTLD_DEFAULT", osName.equals("bsd") || osName.equals("linux") ? null : INVALID_RTLD_DEFAULT_HANDLE);

    /**
     * This field is used to pass exception objects into and out of the runtime system during
     * exception handling for compiled code.
     */
    public final int threadExceptionOopOffset = getFieldOffset("JavaThread::_exception_oop", Integer.class, "oop");
    public final int threadExceptionPcOffset = getFieldOffset("JavaThread::_exception_pc", Integer.class, "address");
    public final int pendingExceptionOffset = getFieldOffset("ThreadShadow::_pending_exception", Integer.class, "oop");

    public final int pendingDeoptimizationOffset = getFieldOffset("JavaThread::_pending_deoptimization", Integer.class, "int");
    public final int pendingFailedSpeculationOffset = getFieldOffset("JavaThread::_pending_failed_speculation", Integer.class, "oop");
    public final int pendingTransferToInterpreterOffset = getFieldOffset("JavaThread::_pending_transfer_to_interpreter", Integer.class, "bool");

    private final int javaFrameAnchorLastJavaSpOffset = getFieldOffset("JavaFrameAnchor::_last_Java_sp", Integer.class, "intptr_t*");
    private final int javaFrameAnchorLastJavaPcOffset = getFieldOffset("JavaFrameAnchor::_last_Java_pc", Integer.class, "address");

    public int threadLastJavaSpOffset() {
        return javaThreadAnchorOffset + javaFrameAnchorLastJavaSpOffset;
    }

    public int threadLastJavaPcOffset() {
        return javaThreadAnchorOffset + javaFrameAnchorLastJavaPcOffset;
    }

    public int threadLastJavaFpOffset() {
        assert osArch.equals("aarch64") || osArch.equals("amd64");
        return javaThreadAnchorOffset + getFieldOffset("JavaFrameAnchor::_last_Java_fp", Integer.class, "intptr_t*");
    }

    public int threadJavaFrameAnchorFlagsOffset() {
        assert osArch.equals("sparc");
        return javaThreadAnchorOffset + getFieldOffset("JavaFrameAnchor::_flags", Integer.class, "int");
    }

    public final int runtimeCallStackSize = getConstant("frame::arg_reg_save_area_bytes", Integer.class, intRequiredOnAMD64);
    public final int frameInterpreterFrameSenderSpOffset = getConstant("frame::interpreter_frame_sender_sp_offset", Integer.class, intRequiredOnAMD64);
    public final int frameInterpreterFrameLastSpOffset = getConstant("frame::interpreter_frame_last_sp_offset", Integer.class, intRequiredOnAMD64);

    private final int dirtyCardQueueBufferOffset = isJDK8 ? getFieldOffset("PtrQueue::_buf", Integer.class, "void**") : getConstant("dirtyCardQueueBufferOffset", Integer.class);
    private final int dirtyCardQueueIndexOffset = isJDK8 ? getFieldOffset("PtrQueue::_index", Integer.class, "size_t") : getConstant("dirtyCardQueueIndexOffset", Integer.class);

    private final int satbMarkQueueBufferOffset = getConstant("satbMarkQueueBufferOffset", Integer.class, intNotPresentInJDK8);
    private final int satbMarkQueueIndexOffset = getConstant("satbMarkQueueIndexOffset", Integer.class, intNotPresentInJDK8);
    private final int satbMarkQueueActiveOffset = isJDK8 ? getFieldOffset("PtrQueue::_active", Integer.class, "bool") : getConstant("satbMarkQueueActiveOffset", Integer.class, intNotPresentInJDK8);

    public final int osThreadInterruptedOffset = getFieldOffset("OSThread::_interrupted", Integer.class, "jint");

    public final long markOopDescHashShift = getConstant("markOopDesc::hash_shift", Long.class);

    public final int biasedLockMaskInPlace = getConstant("markOopDesc::biased_lock_mask_in_place", Integer.class);
    public final int ageMaskInPlace = getConstant("markOopDesc::age_mask_in_place", Integer.class);
    public final int epochMaskInPlace = getConstant("markOopDesc::epoch_mask_in_place", Integer.class);
    public final long markOopDescHashMask = getConstant("markOopDesc::hash_mask", Long.class);
    public final long markOopDescHashMaskInPlace = getConstant("markOopDesc::hash_mask_in_place", Long.class);

    public final int unlockedMask = getConstant("markOopDesc::unlocked_value", Integer.class);
    public final int monitorMask = getConstant("markOopDesc::monitor_value", Integer.class, -1);
    public final int biasedLockPattern = getConstant("markOopDesc::biased_lock_pattern", Integer.class);

    // This field has no type in vmStructs.cpp
    public final int objectMonitorOwner = getFieldOffset("ObjectMonitor::_owner", Integer.class, null, -1);
    public final int objectMonitorRecursions = getFieldOffset("ObjectMonitor::_recursions", Integer.class, "intptr_t", -1);
    public final int objectMonitorCxq = getFieldOffset("ObjectMonitor::_cxq", Integer.class, "ObjectWaiter*", -1);
    public final int objectMonitorEntryList = getFieldOffset("ObjectMonitor::_EntryList", Integer.class, "ObjectWaiter*", -1);

    public final int markWordNoHashInPlace = getConstant("markOopDesc::no_hash_in_place", Integer.class);
    public final int markWordNoLockInPlace = getConstant("markOopDesc::no_lock_in_place", Integer.class);

    /**
     * See {@code markOopDesc::prototype()}.
     */
    public long arrayPrototypeMarkWord() {
        return markWordNoHashInPlace | markWordNoLockInPlace;
    }

    /**
     * See {@code markOopDesc::copy_set_hash()}.
     */
    public long tlabIntArrayMarkWord() {
        long tmp = arrayPrototypeMarkWord() & (~markOopDescHashMaskInPlace);
        tmp |= ((0x2 & markOopDescHashMask) << markOopDescHashShift);
        return tmp;
    }

    /**
     * Mark word right shift to get identity hash code.
     */
    public final int identityHashCodeShift = getConstant("markOopDesc::hash_shift", Integer.class);

    /**
     * Identity hash code value when uninitialized.
     */
    public final int uninitializedIdentityHashCodeValue = getConstant("markOopDesc::no_hash", Integer.class);

    public final int methodAccessFlagsOffset = getFieldOffset("Method::_access_flags", Integer.class, "AccessFlags");
    public final int methodConstMethodOffset = getFieldOffset("Method::_constMethod", Integer.class, "ConstMethod*");
    public final int methodIntrinsicIdOffset = getFieldOffset("Method::_intrinsic_id", Integer.class, isJDK8 ? "u1" : "u2");
    public final int methodFlagsOffset = getFieldOffset("Method::_flags", Integer.class, isJDK8 ? "u1" : "u2");
    public final int methodVtableIndexOffset = getFieldOffset("Method::_vtable_index", Integer.class, "int");

    public final int methodCountersOffset = getFieldOffset("Method::_method_counters", Integer.class, "MethodCounters*");
    public final int methodDataOffset = getFieldOffset("Method::_method_data", Integer.class, "MethodData*");
    public final int methodCompiledEntryOffset = getFieldOffset("Method::_from_compiled_entry", Integer.class, "address");
    public final int methodCodeOffset = getFieldOffset("Method::_code", Integer.class, isJDK8 ? "nmethod*" : "CompiledMethod*");

    public final int methodFlagsCallerSensitive = getConstant("Method::_caller_sensitive", Integer.class);
    public final int methodFlagsForceInline = getConstant("Method::_force_inline", Integer.class);
    public final int methodFlagsDontInline = getConstant("Method::_dont_inline", Integer.class);
    public final int methodFlagsHidden = getConstant("Method::_hidden", Integer.class);
    public final int nonvirtualVtableIndex = getConstant("Method::nonvirtual_vtable_index", Integer.class);
    public final int invalidVtableIndex = getConstant("Method::invalid_vtable_index", Integer.class);

    public final int invocationCounterOffset = getFieldOffset("MethodCounters::_invocation_counter", Integer.class, "InvocationCounter");
    public final int backedgeCounterOffset = getFieldOffset("MethodCounters::_backedge_counter", Integer.class, "InvocationCounter");
    public final int invocationCounterIncrement = getConstant("InvocationCounter::count_increment", Integer.class, intNotPresentInJDK8);
    public final int invocationCounterShift = getConstant("InvocationCounter::count_shift", Integer.class, intNotPresentInJDK8);

    public final int nmethodEntryOffset = getFieldOffset("nmethod::_verified_entry_point",
                    Integer.class, "address");
    public final int compilationLevelFullOptimization = getConstant("CompLevel_full_optimization",
                    Integer.class);

    public final int constantPoolSize = getFieldValue("CompilerToVM::Data::sizeof_ConstantPool", Integer.class, "int");
    public final int constantPoolLengthOffset = getFieldOffset("ConstantPool::_length",
                    Integer.class, "int");

    public final int heapWordSize = getConstant("HeapWordSize", Integer.class);

    /**
     * Bit pattern that represents a non-oop. Neither the high bits nor the low bits of this value
     * are allowed to look like (respectively) the high or low bits of a real oop.
     */
    public final long nonOopBits = getFieldValue("CompilerToVM::Data::Universe_non_oop_bits", Long.class, "void*");

    public final long verifyOopCounterAddress = getFieldAddress("StubRoutines::_verify_oop_count", "jint");
    public final long verifyOopMask = getFieldValue("CompilerToVM::Data::Universe_verify_oop_mask", Long.class, "uintptr_t");
    public final long verifyOopBits = getFieldValue("CompilerToVM::Data::Universe_verify_oop_bits", Long.class, "uintptr_t");

    public final int logOfHRGrainBytes = getFieldValue("HeapRegion::LogOfHRGrainBytes", Integer.class, "int");

    public final byte dirtyCardValue = isJDK8 ? getFieldValue("CompilerToVM::Data::dirty_card", Byte.class, "int") : getConstant("CardTableModRefBS::dirty_card", Byte.class);
    public final byte g1YoungCardValue = isJDK8 ? getFieldValue("CompilerToVM::Data::g1_young_card", Byte.class, "int") : getConstant("G1SATBCardTableModRefBS::g1_young_gen", Byte.class);

    public final long cardtableStartAddress = getFieldValue("CompilerToVM::Data::cardtable_start_address", Long.class, "jbyte*");
    public final int cardtableShift = getFieldValue("CompilerToVM::Data::cardtable_shift", Integer.class, "int");

    /**
     * This is the largest stack offset encodeable in an OopMapValue. Offsets larger than this will
     * throw an exception during code installation.
     */
    public final int maxOopMapStackOffset = getFieldValueWithAlternate("CompilerToVM::Data::_max_oop_map_stack_offset", "JVMCIRuntime::max_oop_map_stack_offset", Integer.class, "int");

    public final long safepointPollingAddress = getFieldValue("os::_polling_page", Long.class, "address");

    // G1 Collector Related Values.

    public int g1CardQueueIndexOffset() {
        return javaThreadDirtyCardQueueOffset + dirtyCardQueueIndexOffset;
    }

    public int g1CardQueueBufferOffset() {
        return javaThreadDirtyCardQueueOffset + dirtyCardQueueBufferOffset;
    }

    public int g1SATBQueueMarkingOffset() {
        return javaThreadSatbMarkQueueOffset + satbMarkQueueActiveOffset;
    }

    public int g1SATBQueueIndexOffset() {
        return javaThreadSatbMarkQueueOffset + (isJDK8 ? dirtyCardQueueIndexOffset : satbMarkQueueIndexOffset);
    }

    public int g1SATBQueueBufferOffset() {
        return javaThreadSatbMarkQueueOffset + (isJDK8 ? dirtyCardQueueBufferOffset : satbMarkQueueBufferOffset);
    }

    public final int klassOffset = getFieldValue("java_lang_Class::_klass_offset", Integer.class, "int");
    public final int arrayKlassOffset = getFieldValue("java_lang_Class::_array_klass_offset", Integer.class, "int");

    public final int basicLockSize = getFieldValue("CompilerToVM::Data::sizeof_BasicLock", Integer.class, "int");
    public final int basicLockDisplacedHeaderOffset = getFieldOffset("BasicLock::_displaced_header", Integer.class, "markOop");

    public final int threadAllocatedBytesOffset = getFieldOffset("Thread::_allocated_bytes", Integer.class, "jlong");

    public final int tlabRefillWasteIncrement = getFlag("TLABWasteIncrement", Integer.class);

    private final int threadLocalAllocBufferStartOffset = getFieldOffset("ThreadLocalAllocBuffer::_start", Integer.class, "HeapWord*");
    private final int threadLocalAllocBufferEndOffset = getFieldOffset("ThreadLocalAllocBuffer::_end", Integer.class, "HeapWord*");
    private final int threadLocalAllocBufferTopOffset = getFieldOffset("ThreadLocalAllocBuffer::_top", Integer.class, "HeapWord*");
    private final int threadLocalAllocBufferPfTopOffset = getFieldOffset("ThreadLocalAllocBuffer::_pf_top", Integer.class, "HeapWord*");
    private final int threadLocalAllocBufferSlowAllocationsOffset = getFieldOffset("ThreadLocalAllocBuffer::_slow_allocations", Integer.class, "unsigned");
    private final int threadLocalAllocBufferFastRefillWasteOffset = getFieldOffset("ThreadLocalAllocBuffer::_fast_refill_waste", Integer.class, "unsigned");
    private final int threadLocalAllocBufferNumberOfRefillsOffset = getFieldOffset("ThreadLocalAllocBuffer::_number_of_refills", Integer.class, "unsigned");
    private final int threadLocalAllocBufferRefillWasteLimitOffset = getFieldOffset("ThreadLocalAllocBuffer::_refill_waste_limit", Integer.class, "size_t");
    private final int threadLocalAllocBufferDesiredSizeOffset = getFieldOffset("ThreadLocalAllocBuffer::_desired_size", Integer.class, "size_t");

    public int tlabSlowAllocationsOffset() {
        return threadTlabOffset + threadLocalAllocBufferSlowAllocationsOffset;
    }

    public int tlabFastRefillWasteOffset() {
        return threadTlabOffset + threadLocalAllocBufferFastRefillWasteOffset;
    }

    public int tlabNumberOfRefillsOffset() {
        return threadTlabOffset + threadLocalAllocBufferNumberOfRefillsOffset;
    }

    public int tlabRefillWasteLimitOffset() {
        return threadTlabOffset + threadLocalAllocBufferRefillWasteLimitOffset;
    }

    public int threadTlabSizeOffset() {
        return threadTlabOffset + threadLocalAllocBufferDesiredSizeOffset;
    }

    public int threadTlabStartOffset() {
        return threadTlabOffset + threadLocalAllocBufferStartOffset;
    }

    public int threadTlabEndOffset() {
        return threadTlabOffset + threadLocalAllocBufferEndOffset;
    }

    public int threadTlabTopOffset() {
        return threadTlabOffset + threadLocalAllocBufferTopOffset;
    }

    public int threadTlabPfTopOffset() {
        return threadTlabOffset + threadLocalAllocBufferPfTopOffset;
    }

    public final int tlabAlignmentReserve = getFieldValue("CompilerToVM::Data::ThreadLocalAllocBuffer_alignment_reserve", Integer.class, "size_t");

    public final boolean tlabStats = getFlag("TLABStats", Boolean.class);

    // FIXME This is only temporary until the GC code is changed.
    public final boolean inlineContiguousAllocationSupported = getFieldValue("CompilerToVM::Data::_supports_inline_contig_alloc", Boolean.class);
    public final long heapEndAddress = getFieldValue("CompilerToVM::Data::_heap_end_addr", Long.class, "HeapWord**");
    public final long heapTopAddress = getFieldValue("CompilerToVM::Data::_heap_top_addr", Long.class, isJDK8 ? "HeapWord**" : "HeapWord* volatile*");

    public final long inlineCacheMissStub = getFieldValue("CompilerToVM::Data::SharedRuntime_ic_miss_stub", Long.class, "address");
    public final long handleWrongMethodStub = getFieldValue("CompilerToVM::Data::SharedRuntime_handle_wrong_method_stub", Long.class, "address");

    public final long handleDeoptStub = getFieldValue("CompilerToVM::Data::SharedRuntime_deopt_blob_unpack", Long.class, "address");
    public final long uncommonTrapStub = getFieldValue("CompilerToVM::Data::SharedRuntime_deopt_blob_uncommon_trap", Long.class, "address");

    public final long codeCacheLowBound = getFieldValue(isJDK8 ? "CompilerToVM::Data::CodeCache_low_bound" : "CodeCache::_low_bound", Long.class, "address");
    public final long codeCacheHighBound = getFieldValue(isJDK8 ? "CompilerToVM::Data::CodeCache_high_bound" : "CodeCache::_high_bound", Long.class, "address");

    public final long aescryptEncryptBlockStub = getFieldValue("StubRoutines::_aescrypt_encryptBlock", Long.class, "address");
    public final long aescryptDecryptBlockStub = getFieldValue("StubRoutines::_aescrypt_decryptBlock", Long.class, "address");
    public final long cipherBlockChainingEncryptAESCryptStub = getFieldValue("StubRoutines::_cipherBlockChaining_encryptAESCrypt", Long.class, "address");
    public final long cipherBlockChainingDecryptAESCryptStub = getFieldValue("StubRoutines::_cipherBlockChaining_decryptAESCrypt", Long.class, "address");
    public final long updateBytesCRC32Stub = getFieldValue("StubRoutines::_updateBytesCRC32", Long.class, "address");
    public final long crcTableAddress = getFieldValue("StubRoutines::_crc_table_adr", Long.class, "address");

    public final long sha1ImplCompress = getFieldValue("StubRoutines::_sha1_implCompress", Long.class, "address", 0L);
    public final long sha1ImplCompressMB = getFieldValue("StubRoutines::_sha1_implCompressMB", Long.class, "address", 0L);
    public final long sha256ImplCompress = getFieldValue("StubRoutines::_sha256_implCompress", Long.class, "address", 0L);
    public final long sha256ImplCompressMB = getFieldValue("StubRoutines::_sha256_implCompressMB", Long.class, "address", 0L);
    public final long sha512ImplCompress = getFieldValue("StubRoutines::_sha512_implCompress", Long.class, "address", 0L);
    public final long sha512ImplCompressMB = getFieldValue("StubRoutines::_sha512_implCompressMB", Long.class, "address", 0L);
    public final long multiplyToLen = getFieldValue("StubRoutines::_multiplyToLen", Long.class, "address", longRequiredOnAMD64);

    public final long counterModeAESCrypt = getFieldValue("StubRoutines::_counterMode_AESCrypt", Long.class, "address", 0L);
    public final long ghashProcessBlocks = getFieldValue("StubRoutines::_ghash_processBlocks", Long.class, "address", 0L);
    public final long crc32cTableTddr = getFieldValue("StubRoutines::_crc32c_table_addr", Long.class, "address", 0L);
    public final long updateBytesCRC32C = getFieldValue("StubRoutines::_updateBytesCRC32C", Long.class, "address", 0L);
    public final long updateBytesAdler32 = getFieldValue("StubRoutines::_updateBytesAdler32", Long.class, "address", 0L);
    public final long squareToLen = getFieldValue("StubRoutines::_squareToLen", Long.class, "address", longRequiredOnAMD64);
    public final long mulAdd = getFieldValue("StubRoutines::_mulAdd", Long.class, "address", longRequiredOnAMD64);
    public final long montgomeryMultiply = getFieldValue("StubRoutines::_montgomeryMultiply", Long.class, "address", longRequiredOnAMD64);
    public final long montgomerySquare = getFieldValue("StubRoutines::_montgomerySquare", Long.class, "address", longRequiredOnAMD64);
    public final long vectorizedMismatch = getFieldValue("StubRoutines::_vectorizedMismatch", Long.class, "address", 0L);

    public final long throwDelayedStackOverflowErrorEntry = getFieldValue("StubRoutines::_throw_delayed_StackOverflowError_entry", Long.class, "address", longNotPresentInJDK8);

    public final long jbyteArraycopy = getFieldValue("StubRoutines::_jbyte_arraycopy", Long.class, "address");
    public final long jshortArraycopy = getFieldValue("StubRoutines::_jshort_arraycopy", Long.class, "address");
    public final long jintArraycopy = getFieldValue("StubRoutines::_jint_arraycopy", Long.class, "address");
    public final long jlongArraycopy = getFieldValue("StubRoutines::_jlong_arraycopy", Long.class, "address");
    public final long oopArraycopy = getFieldValue("StubRoutines::_oop_arraycopy", Long.class, "address");
    public final long oopArraycopyUninit = getFieldValue("StubRoutines::_oop_arraycopy_uninit", Long.class, "address");
    public final long jbyteDisjointArraycopy = getFieldValue("StubRoutines::_jbyte_disjoint_arraycopy", Long.class, "address");
    public final long jshortDisjointArraycopy = getFieldValue("StubRoutines::_jshort_disjoint_arraycopy", Long.class, "address");
    public final long jintDisjointArraycopy = getFieldValue("StubRoutines::_jint_disjoint_arraycopy", Long.class, "address");
    public final long jlongDisjointArraycopy = getFieldValue("StubRoutines::_jlong_disjoint_arraycopy", Long.class, "address");
    public final long oopDisjointArraycopy = getFieldValue("StubRoutines::_oop_disjoint_arraycopy", Long.class, "address");
    public final long oopDisjointArraycopyUninit = getFieldValue("StubRoutines::_oop_disjoint_arraycopy_uninit", Long.class, "address");
    public final long jbyteAlignedArraycopy = getFieldValue("StubRoutines::_arrayof_jbyte_arraycopy", Long.class, "address");
    public final long jshortAlignedArraycopy = getFieldValue("StubRoutines::_arrayof_jshort_arraycopy", Long.class, "address");
    public final long jintAlignedArraycopy = getFieldValue("StubRoutines::_arrayof_jint_arraycopy", Long.class, "address");
    public final long jlongAlignedArraycopy = getFieldValue("StubRoutines::_arrayof_jlong_arraycopy", Long.class, "address");
    public final long oopAlignedArraycopy = getFieldValue("StubRoutines::_arrayof_oop_arraycopy", Long.class, "address");
    public final long oopAlignedArraycopyUninit = getFieldValue("StubRoutines::_arrayof_oop_arraycopy_uninit", Long.class, "address");
    public final long jbyteAlignedDisjointArraycopy = getFieldValue("StubRoutines::_arrayof_jbyte_disjoint_arraycopy", Long.class, "address");
    public final long jshortAlignedDisjointArraycopy = getFieldValue("StubRoutines::_arrayof_jshort_disjoint_arraycopy", Long.class, "address");
    public final long jintAlignedDisjointArraycopy = getFieldValue("StubRoutines::_arrayof_jint_disjoint_arraycopy", Long.class, "address");
    public final long jlongAlignedDisjointArraycopy = getFieldValue("StubRoutines::_arrayof_jlong_disjoint_arraycopy", Long.class, "address");
    public final long oopAlignedDisjointArraycopy = getFieldValue("StubRoutines::_arrayof_oop_disjoint_arraycopy", Long.class, "address");
    public final long oopAlignedDisjointArraycopyUninit = getFieldValue("StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit", Long.class, "address");
    public final long checkcastArraycopy = getFieldValue("StubRoutines::_checkcast_arraycopy", Long.class, "address");
    public final long checkcastArraycopyUninit = getFieldValue("StubRoutines::_checkcast_arraycopy_uninit", Long.class, "address");
    public final long unsafeArraycopy = getFieldValue("StubRoutines::_unsafe_arraycopy", Long.class, "address");
    public final long genericArraycopy = getFieldValue("StubRoutines::_generic_arraycopy", Long.class, "address");

    public final long newInstanceAddress = getAddress("JVMCIRuntime::new_instance");
    public final long newArrayAddress = getAddress("JVMCIRuntime::new_array");
    public final long newMultiArrayAddress = getAddress("JVMCIRuntime::new_multi_array");
    public final long dynamicNewArrayAddress = getAddress("JVMCIRuntime::dynamic_new_array");
    public final long dynamicNewInstanceAddress = getAddress("JVMCIRuntime::dynamic_new_instance");

    public final long threadIsInterruptedAddress = getAddress("JVMCIRuntime::thread_is_interrupted");
    public final long vmMessageAddress = getAddress("JVMCIRuntime::vm_message");
    public final long identityHashCodeAddress = getAddress("JVMCIRuntime::identity_hash_code");
    public final long exceptionHandlerForPcAddress = getAddress("JVMCIRuntime::exception_handler_for_pc");
    public final long monitorenterAddress = getAddress("JVMCIRuntime::monitorenter");
    public final long monitorexitAddress = getAddress("JVMCIRuntime::monitorexit");
    public final long throwAndPostJvmtiExceptionAddress = getAddress("JVMCIRuntime::throw_and_post_jvmti_exception");
    public final long throwKlassExternalNameExceptionAddress = getAddress("JVMCIRuntime::throw_klass_external_name_exception");
    public final long throwClassCastExceptionAddress = getAddress("JVMCIRuntime::throw_class_cast_exception");
    public final long logPrimitiveAddress = getAddress("JVMCIRuntime::log_primitive");
    public final long logObjectAddress = getAddress("JVMCIRuntime::log_object");
    public final long logPrintfAddress = getAddress("JVMCIRuntime::log_printf");
    public final long vmErrorAddress = getAddress("JVMCIRuntime::vm_error");
    public final long loadAndClearExceptionAddress = getAddress("JVMCIRuntime::load_and_clear_exception");
    public final long writeBarrierPreAddress = getAddress("JVMCIRuntime::write_barrier_pre");
    public final long writeBarrierPostAddress = getAddress("JVMCIRuntime::write_barrier_post");
    public final long validateObject = getAddress("JVMCIRuntime::validate_object");

    public final long testDeoptimizeCallInt = getAddress("JVMCIRuntime::test_deoptimize_call_int");

    public final long registerFinalizerAddress = getAddress("SharedRuntime::register_finalizer");
    public final long exceptionHandlerForReturnAddressAddress = getAddress("SharedRuntime::exception_handler_for_return_address");
    public final long osrMigrationEndAddress = getAddress("SharedRuntime::OSR_migration_end");
    public final long enableStackReservedZoneAddress = getAddress("SharedRuntime::enable_stack_reserved_zone", longNotPresentInJDK8);

    public final long javaTimeMillisAddress = getAddress("os::javaTimeMillis");
    public final long javaTimeNanosAddress = getAddress("os::javaTimeNanos");
    public final long arithmeticSinAddress = getFieldValue("CompilerToVM::Data::dsin", Long.class, "address");
    public final long arithmeticCosAddress = getFieldValue("CompilerToVM::Data::dcos", Long.class, "address");
    public final long arithmeticTanAddress = getFieldValue("CompilerToVM::Data::dtan", Long.class, "address");
    public final long arithmeticExpAddress = getFieldValue("CompilerToVM::Data::dexp", Long.class, "address");
    public final long arithmeticLogAddress = getFieldValue("CompilerToVM::Data::dlog", Long.class, "address");
    public final long arithmeticLog10Address = getFieldValue("CompilerToVM::Data::dlog10", Long.class, "address");
    public final long arithmeticPowAddress = getFieldValue("CompilerToVM::Data::dpow", Long.class, "address");

    public final long fremAddress = getAddress("SharedRuntime::frem");
    public final long dremAddress = getAddress("SharedRuntime::drem");

    public final int jvmciCountersSize = getFlag("JVMCICounterSize", Integer.class);

    public final long deoptimizationFetchUnrollInfo = getAddress("Deoptimization::fetch_unroll_info");
    public final long deoptimizationUncommonTrap = getAddress("Deoptimization::uncommon_trap");
    public final long deoptimizationUnpackFrames = getAddress("Deoptimization::unpack_frames");

    public final int deoptimizationUnpackDeopt = getConstant("Deoptimization::Unpack_deopt", Integer.class);
    public final int deoptimizationUnpackException = getConstant("Deoptimization::Unpack_exception", Integer.class);
    public final int deoptimizationUnpackUncommonTrap = getConstant("Deoptimization::Unpack_uncommon_trap", Integer.class);
    public final int deoptimizationUnpackReexecute = getConstant("Deoptimization::Unpack_reexecute", Integer.class);

    public final int deoptimizationUnrollBlockSizeOfDeoptimizedFrameOffset = getFieldOffset("Deoptimization::UnrollBlock::_size_of_deoptimized_frame", Integer.class, "int");
    public final int deoptimizationUnrollBlockCallerAdjustmentOffset = getFieldOffset("Deoptimization::UnrollBlock::_caller_adjustment", Integer.class, "int");
    public final int deoptimizationUnrollBlockNumberOfFramesOffset = getFieldOffset("Deoptimization::UnrollBlock::_number_of_frames", Integer.class, "int");
    public final int deoptimizationUnrollBlockTotalFrameSizesOffset = getFieldOffset("Deoptimization::UnrollBlock::_total_frame_sizes", Integer.class, "int");
    public final int deoptimizationUnrollBlockUnpackKindOffset = getFieldOffset("Deoptimization::UnrollBlock::_unpack_kind", Integer.class, "int");
    public final int deoptimizationUnrollBlockFrameSizesOffset = getFieldOffset("Deoptimization::UnrollBlock::_frame_sizes", Integer.class, "intptr_t*");
    public final int deoptimizationUnrollBlockFramePcsOffset = getFieldOffset("Deoptimization::UnrollBlock::_frame_pcs", Integer.class, "address*");
    public final int deoptimizationUnrollBlockInitialInfoOffset = getFieldOffset("Deoptimization::UnrollBlock::_initial_info", Integer.class, "intptr_t");

    // Checkstyle: stop
    public final int MARKID_VERIFIED_ENTRY = getConstant("CodeInstaller::VERIFIED_ENTRY", Integer.class);
    public final int MARKID_UNVERIFIED_ENTRY = getConstant("CodeInstaller::UNVERIFIED_ENTRY", Integer.class);
    public final int MARKID_OSR_ENTRY = getConstant("CodeInstaller::OSR_ENTRY", Integer.class);
    public final int MARKID_EXCEPTION_HANDLER_ENTRY = getConstant("CodeInstaller::EXCEPTION_HANDLER_ENTRY", Integer.class);
    public final int MARKID_DEOPT_HANDLER_ENTRY = getConstant("CodeInstaller::DEOPT_HANDLER_ENTRY", Integer.class);
    public final int MARKID_INVOKEINTERFACE = getConstant("CodeInstaller::INVOKEINTERFACE", Integer.class);
    public final int MARKID_INVOKEVIRTUAL = getConstant("CodeInstaller::INVOKEVIRTUAL", Integer.class);
    public final int MARKID_INVOKESTATIC = getConstant("CodeInstaller::INVOKESTATIC", Integer.class);
    public final int MARKID_INVOKESPECIAL = getConstant("CodeInstaller::INVOKESPECIAL", Integer.class);
    public final int MARKID_INLINE_INVOKE = getConstant("CodeInstaller::INLINE_INVOKE", Integer.class);
    public final int MARKID_POLL_NEAR = getConstant("CodeInstaller::POLL_NEAR", Integer.class);
    public final int MARKID_POLL_RETURN_NEAR = getConstant("CodeInstaller::POLL_RETURN_NEAR", Integer.class);
    public final int MARKID_POLL_FAR = getConstant("CodeInstaller::POLL_FAR", Integer.class);
    public final int MARKID_POLL_RETURN_FAR = getConstant("CodeInstaller::POLL_RETURN_FAR", Integer.class);
    public final int MARKID_CARD_TABLE_SHIFT = getConstant("CodeInstaller::CARD_TABLE_SHIFT", Integer.class);
    public final int MARKID_CARD_TABLE_ADDRESS = getConstant("CodeInstaller::CARD_TABLE_ADDRESS", Integer.class);
    public final int MARKID_INVOKE_INVALID = getConstant("CodeInstaller::INVOKE_INVALID", Integer.class);

    /**
     * The following constants are given default values here since they are missing in the native
     * JVMCI-8 code but are still required for {@link GraalHotSpotVMConfigNode#canonical} to work in
     * a JDK8 environment.
     */
    public final int MARKID_HEAP_TOP_ADDRESS = getConstant("CodeInstaller::HEAP_TOP_ADDRESS", Integer.class, 17);
    public final int MARKID_HEAP_END_ADDRESS = getConstant("CodeInstaller::HEAP_END_ADDRESS", Integer.class, 18);
    public final int MARKID_NARROW_KLASS_BASE_ADDRESS = getConstant("CodeInstaller::NARROW_KLASS_BASE_ADDRESS", Integer.class, 19);
    public final int MARKID_NARROW_OOP_BASE_ADDRESS = getConstant("CodeInstaller::NARROW_OOP_BASE_ADDRESS", Integer.class, 20);
    public final int MARKID_CRC_TABLE_ADDRESS = getConstant("CodeInstaller::CRC_TABLE_ADDRESS", Integer.class, 21);
    public final int MARKID_LOG_OF_HEAP_REGION_GRAIN_BYTES = getConstant("CodeInstaller::LOG_OF_HEAP_REGION_GRAIN_BYTES", Integer.class, 22);
    public final int MARKID_INLINE_CONTIGUOUS_ALLOCATION_SUPPORTED = getConstant("CodeInstaller::INLINE_CONTIGUOUS_ALLOCATION_SUPPORTED", Integer.class, 23);

    // Checkstyle: resume

    protected boolean check() {
        for (Field f : getClass().getDeclaredFields()) {
            int modifiers = f.getModifiers();
            if (Modifier.isPublic(modifiers) && !Modifier.isStatic(modifiers)) {
                assert Modifier.isFinal(modifiers) : "field should be final: " + f;
            }
        }

        assert codeEntryAlignment > 0 : codeEntryAlignment;
        return true;
    }
}