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Use Bytes Trie to track warm addresses (hyperledger#6069)
* Use Bytes Trie to track warm addresses Move from a java HashSet to a custom Trie based on bytes to store the warm addresses, creates, and self-destructs. This avoids needing to calculate java hashes or engage in using custom Comparators. Signed-off-by: Danno Ferrin <danno.ferrin@swirldslabs.com> * codeql scan Signed-off-by: Danno Ferrin <danno.ferrin@swirldslabs.com> --------- Signed-off-by: Danno Ferrin <danno.ferrin@swirldslabs.com> Signed-off-by: Sally MacFarlane <macfarla.github@gmail.com> Co-authored-by: Sally MacFarlane <macfarla.github@gmail.com>
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evm/src/main/java/org/hyperledger/besu/collections/trie/BytesTrieSet.java
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| /* | ||
| * Copyright contributors to Hyperledger Besu | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on | ||
| * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations under the License. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| */ | ||
| package org.hyperledger.besu.collections.trie; | ||
|
|
||
| import java.util.AbstractSet; | ||
| import java.util.ArrayDeque; | ||
| import java.util.Arrays; | ||
| import java.util.Deque; | ||
| import java.util.Iterator; | ||
| import java.util.NoSuchElementException; | ||
| import java.util.Objects; | ||
|
|
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| import org.apache.tuweni.bytes.Bytes; | ||
|
|
||
| /** | ||
| * A Bytes optimized set that stores values in a trie by byte | ||
| * | ||
| * @param <E> Type of trie | ||
| */ | ||
| public class BytesTrieSet<E extends Bytes> extends AbstractSet<E> { | ||
|
|
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| record Node<E extends Bytes>(byte[] leafArray, E leafObject, Node<E>[] children) { | ||
|
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| @Override | ||
| public boolean equals(final Object o) { | ||
| if (this == o) return true; | ||
| if (!(o instanceof Node<?> node)) return false; | ||
| return Arrays.equals(leafArray, node.leafArray) | ||
| && Objects.equals(leafObject, node.leafObject) | ||
| && Arrays.equals(children, node.children); | ||
| } | ||
|
|
||
| @Override | ||
| public int hashCode() { | ||
| int result = Objects.hash(leafObject); | ||
| result = 31 * result + Arrays.hashCode(leafArray); | ||
| result = 31 * result + Arrays.hashCode(children); | ||
| return result; | ||
| } | ||
|
|
||
| @Override | ||
| public String toString() { | ||
| final StringBuilder sb = new StringBuilder("Node{"); | ||
| sb.append("leaf="); | ||
| if (leafObject == null) sb.append("null"); | ||
| else { | ||
| sb.append('['); | ||
| System.out.println(leafObject.toHexString()); | ||
| sb.append(']'); | ||
| } | ||
| sb.append(", children="); | ||
| if (children == null) sb.append("null"); | ||
| else { | ||
| sb.append('['); | ||
| for (int i = 0; i < children.length; ++i) { | ||
| if (children[i] == null) { | ||
| continue; | ||
| } | ||
| sb.append(i == 0 ? "" : ", ").append(i).append("=").append(children[i]); | ||
| } | ||
| sb.append(']'); | ||
| } | ||
| sb.append('}'); | ||
| return sb.toString(); | ||
| } | ||
| } | ||
|
|
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| Node<E> root; | ||
|
|
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| int size = 0; | ||
| final int byteLength; | ||
|
|
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| /** | ||
| * Create a BytesTrieSet with a fixed length | ||
| * | ||
| * @param byteLength length in bytes of the stored types | ||
| */ | ||
| public BytesTrieSet(final int byteLength) { | ||
| this.byteLength = byteLength; | ||
| } | ||
|
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| static class NodeWalker<E extends Bytes> { | ||
| final Node<E> node; | ||
| int lastRead; | ||
|
|
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| NodeWalker(final Node<E> node) { | ||
| this.node = node; | ||
| this.lastRead = -1; | ||
| } | ||
|
|
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| NodeWalker<E> nextNodeWalker() { | ||
| if (node.children == null) { | ||
| return null; | ||
| } | ||
| while (lastRead < 255) { | ||
| lastRead++; | ||
| Node<E> child = node.children[lastRead]; | ||
| if (child != null) { | ||
| return new NodeWalker<>(child); | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
|
|
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| E thisNode() { | ||
| return node.leafObject; | ||
| } | ||
| } | ||
|
|
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| @Override | ||
| public Iterator<E> iterator() { | ||
| var result = | ||
| new Iterator<E>() { | ||
| final Deque<NodeWalker<E>> stack = new ArrayDeque<>(); | ||
| E next; | ||
| E last; | ||
|
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| @Override | ||
| public boolean hasNext() { | ||
| return next != null; | ||
| } | ||
|
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| @Override | ||
| public E next() { | ||
| if (next == null) { | ||
| throw new NoSuchElementException(); | ||
| } | ||
| last = next; | ||
| advance(); | ||
| return last; | ||
| } | ||
|
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| @Override | ||
| public void remove() { | ||
| BytesTrieSet.this.remove(last); | ||
| } | ||
|
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| void advance() { | ||
| while (!stack.isEmpty()) { | ||
| NodeWalker<E> thisStep = stack.peek(); | ||
| var nextStep = thisStep.nextNodeWalker(); | ||
| if (nextStep == null) { | ||
| stack.pop(); | ||
| if (thisStep.thisNode() != null) { | ||
| next = thisStep.thisNode(); | ||
| return; | ||
| } | ||
| } else { | ||
| stack.push(nextStep); | ||
| } | ||
| } | ||
| next = null; | ||
| } | ||
| }; | ||
| if (root != null) { | ||
| result.stack.add(new NodeWalker<>(root)); | ||
| } | ||
| result.advance(); | ||
| return result; | ||
| } | ||
|
|
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| @Override | ||
| public int size() { | ||
| return size; | ||
| } | ||
|
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| @Override | ||
| public boolean contains(final Object o) { | ||
| if (!(o instanceof Bytes bytes)) { | ||
| throw new IllegalArgumentException( | ||
| "Expected Bytes, got " + (o == null ? "null" : o.getClass().getName())); | ||
| } | ||
| byte[] array = bytes.toArrayUnsafe(); | ||
| if (array.length != byteLength) { | ||
| throw new IllegalArgumentException( | ||
| "Byte array is size " + array.length + " but set is size " + byteLength); | ||
| } | ||
| if (root == null) { | ||
| return false; | ||
| } | ||
| int level = 0; | ||
| Node<E> current = root; | ||
| while (current != null) { | ||
| if (current.leafObject != null) { | ||
| return Arrays.compare(current.leafArray, array) == 0; | ||
| } | ||
| current = current.children[array[level] & 0xff]; | ||
| level++; | ||
| } | ||
| return false; | ||
| } | ||
|
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| @Override | ||
| public boolean remove(final Object o) { | ||
| // Two base cases, size==0 and size==1; | ||
| if (!(o instanceof Bytes bytes)) { | ||
| throw new IllegalArgumentException( | ||
| "Expected Bytes, got " + (o == null ? "null" : o.getClass().getName())); | ||
| } | ||
| byte[] array = bytes.toArrayUnsafe(); | ||
| if (array.length != byteLength) { | ||
| throw new IllegalArgumentException( | ||
| "Byte array is size " + array.length + " but set is size " + byteLength); | ||
| } | ||
| // Two base cases, size==0 and size==1; | ||
| if (root == null) { | ||
| // size==0 is easy, empty | ||
| return false; | ||
| } | ||
| if (root.leafObject != null) { | ||
| // size==1 just check and possibly remove the root | ||
| if (Arrays.compare(array, root.leafArray) == 0) { | ||
| root = null; | ||
| size--; | ||
| return true; | ||
| } else { | ||
| return false; | ||
| } | ||
| } | ||
| int level = 0; | ||
| Node<E> current = root; | ||
| do { | ||
| int index = array[level] & 0xff; | ||
| Node<E> next = current.children[index]; | ||
| if (next == null) { | ||
| return false; | ||
| } | ||
| if (next.leafObject != null) { | ||
| if (Arrays.compare(array, next.leafArray) == 0) { | ||
| // TODO there is no cleanup of empty branches | ||
| current.children[index] = null; | ||
| size--; | ||
| return true; | ||
| } else { | ||
| return false; | ||
| } | ||
| } | ||
| current = next; | ||
|
|
||
| level++; | ||
| } while (true); | ||
| } | ||
|
|
||
| @SuppressWarnings({"unchecked", "rawtypes"}) | ||
| @Override | ||
| public boolean add(final E bytes) { | ||
| byte[] array = bytes.toArrayUnsafe(); | ||
| if (array.length != byteLength) { | ||
| throw new IllegalArgumentException( | ||
| "Byte array is size " + array.length + " but set is size " + byteLength); | ||
| } | ||
| // Two base cases, size==0 and size==1; | ||
| if (root == null) { | ||
| // size==0 is easy, just add | ||
| root = new Node<>(array, bytes, null); | ||
| size++; | ||
| return true; | ||
| } | ||
| if (root.leafObject != null) { | ||
| // size==1 first check then if no match make it look like n>1 | ||
| if (Arrays.compare(array, root.leafArray) == 0) { | ||
| return false; | ||
| } | ||
| Node<E> oldRoot = root; | ||
| root = new Node<>(null, null, new Node[256]); | ||
| root.children[oldRoot.leafArray[0] & 0xff] = oldRoot; | ||
| } | ||
| int level = 0; | ||
| Node<E> current = root; | ||
| do { | ||
| int index = array[level] & 0xff; | ||
| Node<E> next = current.children[index]; | ||
| if (next == null) { | ||
| next = new Node<>(array, bytes, null); | ||
| current.children[index] = next; | ||
| size++; | ||
| return true; | ||
| } | ||
| if (next.leafObject != null) { | ||
| if (Arrays.compare(array, next.leafArray) == 0) { | ||
| return false; | ||
| } | ||
| Node<E> newLeaf = new Node<>(null, null, new Node[256]); | ||
| newLeaf.children[next.leafArray[level + 1] & 0xff] = next; | ||
| current.children[index] = newLeaf; | ||
| next = newLeaf; | ||
| } | ||
| level++; | ||
|
|
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| current = next; | ||
|
|
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| } while (true); | ||
| } | ||
|
|
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| @Override | ||
| public void clear() { | ||
| root = null; | ||
| } | ||
| } |
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